﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using HtmlAgilityPack;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x804 上介绍了“空白页”项模板

namespace ProgrammerToolsKits
{
    /// <summary>
    /// 可用于自身或导航至 Frame 内部的空白页。
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            ViewHelper.ViewHelper.ExtensionTitleBar( this );
            var view = Windows.UI.Core.SystemNavigationManager.GetForCurrentView();
            view.AppViewBackButtonVisibility = Windows.UI.Core.AppViewBackButtonVisibility.Visible;
            view.BackRequested += GoBack;
        }



        private void GoBack(object sender,Windows.UI.Core.BackRequestedEventArgs e)
        {
            e.Handled = true;
            var view = Window.Current.Content as Frame;
            if(view != null)
            {
                if ( view.CanGoBack )
                    view.GoBack();
            }
            
        }
    }
}
